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From the following information X + H2 ...

From the following information
`X + H_2 SO_4 rarr Y` (a colourless and irritating gas)
`Y + K_2 Cr_2 O_7 + H_2 SO_4 rarr` green coloured solution Identify the pair `X` and `Y`.

A

`Cl^(Ө), HCl`

B

`So_3^(2-),SO_2`

C

`S^(2-), H_2 S`

D

`CO_3^(2-), CO_2`

Text Solution

Verified by Experts

The correct Answer is:
B
`underset((X)) (SO_(3)^(2-)) + 2H^(oplus) rarr underset((Y)) (SO_2) + H_2 O`
`3 SO_2 + K_2 Cr_2 O_7 + H_2 SO_4 rarr K_2 SO_4 + underset("Green coloured solution") (Cr_2(SO_4)_3 + H_2 O)`.
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